Friction clutch mechanism.



1%. 754,644. PATENTED MAR. 15, 1904.

I s. J. DAVIS.

FRICTION CLUTCH MECHANISM.

APPLICATION FILED JULY 1'7, 1903.

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no. 754,644, Patented March 15, 1904-.

UNITED STATES PATENT OFFICE.

SPURGEON J. DAVIS, OF CATHLAMET, WASHINGTON, ASSIGNOR TO THE DAVIS-MCGREGOR MANUFACTURING COMPANY, OF PORTLAND, ORE- GON, A CORPORATION. w

FRICTION CLUTCH MECHANISM.

SF'ECIFICATION forming part of Letters Patent No. I('54=,6l=4, dated March 15 1904;.

Application filed July 17, 1903. Serial No. 166,034.- (No model.)

T all it y OOH/067%: my improved clutch mechanism, the clutch Be it known that I, SPURGEON J; DAVIS, respool being shown out of an operative'posi siding at Cathlamet, in the county of Wahkiation in dotted lines. Fig. 2 isa'cross-section kum and State of IVashington, have invented of the same, taken substantially on the line 2 2 5 a new and Improved Friction Clutch Mechanof Fig. 1. Fig. 3 is a detail view of the triple ism, of which the following is a specification. set of toggle-levers; and Fig. 4 is a detail This invention relates to improvements in View of the collar O, hereinafter described. that type of friction clutch mechanisms for Fig. 5 is a cross-section on line 5 5 of Fig. 1. hoisting, logging, or other engines in which In the practical application of my invention I is included a clutch member mounted on the the same includes a cylinder A, open at one power-shaft to rotate therewith, toggle clutch end and provided with a centrally-threaded devices mounted on the shaft movable thereaperture a at the other or closed end whereby with, a shiftable clutch member adapted to be to admit of its being readily screwed up onto locked to its shifted position by the toggle 'one end of the drum-shaft 60., At diametric- 5 clutch devices that cooperates with the clutch ally opposite points the cylinder A has a pair member rotatable with the drive-shaft; and of internal channels or grooves at each end my invention seeks to provide a clutch mechformed by the flanges G, which form guideanism of this type of a simple and economical ways for the endwise-adjustable cross-bar O construction which can be easily manipulated and the ring ordisk F, the purposes of which 20 to effect a quick clutch connection without danwill presently appear.

ger of slipping and in which the friction de- D designates a cap whose annular flange d vices are so designed and have such cooperais internallythreaded to screw onto the cylin 7 tive connection that after once set the load will der A, and the said cap is rigidly held to its be positively held. adjusted positions on the cylinder by a jam- 5 My invention in its generic nature comprering E, as shown.

hends a cylindrical hub mounted on the drum- F .indicates a ring or disk which is of a shaft to rotate therewith, a plunger or piston slightly less diameter than the cylinder A, longitudinally movable in the drum shaft whereby to freely slip into the open end which carries a clutch member for causing the thereof, and the said ring F has projections 3 drum-spool clutch to engage withthe clutch- F which slide in channels formed by the flange carrying gear upon thedrive-shaft whereby to G on the cylinder A, and the said ring F is lock the said drum-spool and the drive-shaft held to bear against the cap D, and it has at to rotate together, toggle devices mounted diametrically opposite points recesses fat its upon the plunger or piston, means located experiphery, into which project the ends it of 35 ternally of the shaft-rotated cylinder for shifttoggle-links H H, pivotally mounted on the ing the toggle devices into'a locked engage studs h, and the said recesses f are suitably mentwith the cylinder whereby to lock the shaped to accommodate the shiftable move- 5 plunger-piston and to lock the clutch members ments of the said toggle-links H. The disk F of the drive-gear and the drum-spool to rotate is also formed with a central aperture f 4 with the cylinder and the shaft. -whose inner end merges with the oppositely In its more subordinate features my invenextended grooves or channels f whichare tion consists in certain details of construction formed to accommodate the toggle-links I I 9 and peculiar combination of parts, all of which when they assume the position shown in dotted will be hereinafter fully described, and speciflines on Fig. 1.

45 ically pointed out in the appended claims, ref- The cap D is formed with an outwardly-proerence being had to the accompanying drawjected hollow hub D, having an annular flange ings, in which- D adapted to receive a ring L, presently Figure 1 is a vertical longitudinal section of again referred to, and a threaded boss D with which engages a threaded keeper or collar P, which holds the ring L on the flange D The hub D is centrally apertured, as at d", and through the said aperture projects the outer end of a piston or plunger K, which extends into the cylinder and has its inner end Z which is flattened or made rectangular in shape, projected into a rectangular socket c in the bar C.

Between the bar C and an annular enlargement or collar W and upon a cross-stud d secured to the plunger, are pivotally mounted the adjacent ends of a double set of togglelinks I I, that straddle the flattened end of the piston K and the inner ends k of the links H, with which they pivotally connect through the stud-pins e e, and the latter also join the links H and I with the links J J, that extend rearwardly and are pivotally connected with the shiftable bar C in a manner clearly shown in Fig. 1.

R designates the friction stem or pin, which butts against and is movable with the bar C and extends into the hollow drum-shaft a, and the other end of the said stem R engages with a cross-key S, which has edgewise movement in a cross-slot or keyway s in the drum-shaft a, and the said key is adapted under its outer or clutching position to engage with the transversely-disposed socket z, in the adjacent wall of the collar T, which opposes the drum-spool 5, (see Fig. 1,) whereby when the spool is pushed, with its clutch-flange 6, into a tight frictional engagement with the drive-gearclutch rim 7 of the drive-gear 8, the shaft, the spool, and the drive-gear are joined to rotate together.

When the plunger K is released, the spring 9 disengages the spool from the drive-gear, and to prevent too great a jar when the plunger K is released I provide a buffer-spring B, as shown.

The ring L is stationary, and to it is connected one end of a link M, the other end of which is pivotally connected with the forked end of a shifting-lever N, the ends a of which engage the trunnions 0 0 of a collar 0, loosely mounted on the outer end of the piston K and held in place by the nut Q, as shown.

When the clutch mechanism is running, the parts L and 0 play loosely on the cap and the piston, respectively, and hence they efiect little or no frictional resistance to the running of the machine.

From the foregoing, taken in connection with the accompanying drawings, the complete construction and manner of operation of my invention will be apparent to those skilled in the art to which my invention appertains. When the lever N is adjusted to the position shown in full lines in Fig. 1, the key S is locked with the collar T, and the latter is held in a tight frictional engagement with the drum-spool 5. To throw off the clutch mechanism, the lever N is swung forward in the direction of the arrow to bring the several toggle members to the position shown in dotted lines, which operation shifts the bar C to release the tension on the pin R and permits the spring 9 to force the drum-spool 5, with its clutch-flange 6, out of engagement with the gear clutch-ring 7. The spring B serves as a cushion to relieve the cap D of jar when the piston K is thrown back by lever action or by back pressure from the drum-spool 5.

By joining the cap D to the cylinder, as shown, the wear on the friction devices can be compensated for by turning the jam-ring E and the cap D a desired distance upon the cylinder A, and as the said cylinder at all times revolves with the drum-shaft it causes no friction whatever upon the ends of the stem R.

All parts rotate together. There is no friction on either end of pin R, as in ordinary friction-clutch mechanisms.

By closing both ends of the cylinders in the manner described and mounting the clutchshifting devices within the said cylinder, as

shown, the latter are effectively protected from the dirt and dust, and the cooperative arrangement of the several parts is such that they can be easily adjusted to take up Wear as well as allowing for a considerable amount of wear before requiring a renewal of any of the parts.

By providing a detachable cap I) for one end of the cylinder access can be quickly had to remove or adjust the working parts Within the cylinder.

Changes in details of construction and modifications thereof can be readily made without departing from my invention or the scope of the appended claims.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

1. A mechanism of the class described, comprising in combination with a drum-shaft, a drive-gear carried thereby and a drum-spool loosely mounted upon said drum-shaft, said drive-gear and said drum-spool having cooperating clutch-faces, of means for shifting said drum-spool into tight frictional engagement with said drive-gear, said means including a cylinder mounted upon the end of the drum-shaft to rotate therewith, and clutch members having toggle connections with each other held within said cylinder, for the purposes specified.

2. In a device of the character stated, comprising in combination with a drum-shaft, the drive-gear and the drum-spool, of means for shifting said drum-spool into tight frictional engagement with the drive-gear, said means including a cylinder mounted upon the drumshaft and open at one end, a detachable cap for said open end, a disk mounted in said end to bear against the inner side of the cap, a cross-bar at the other end of the cylinder, a stem slidable within an aperture in the drumshaft and engaging said cross-bar, means for shifting said cross-bar, said means including a piston longitudinally movable through the cylinder, a toggle mechanism mounted on the piston and connected with the cross-bar and the disk, and means exterior to the cylinder for reciprocating said piston, forthe purposes described.

3. In a device of the character stated, a drum-shaft, a drive-gear carried thereby, a

. drum-spool mounted thereon, said drum-shaft having a longitudinal aperture in one end and a cross-slot registering with the inner portion of said aperture, a cross-key movable within said cross-slot, a stem or pin longitudinally movable within said aperture and abutting said cross-key, a collar mounted upon said shaft between said drum-spool and said crosskey, a cylinder mounted upon said shaft to rotate therewith, and manually operated means carried by said cylinder for shifting said stem or pin and said cross-key into engagement with said drum-spool to cause said drum-spool to engage said drive-gear to turn therewith, as specified.

4c. The combination with a drum-shaft, a

cylinder open at one end detachably connect.

ed thereto to rotate therewith; of a piston axially movable through the cylinder, a drivegear mounted on the drum-shaft, for cooperating with the drum-spool, means for endwise interlocking said drive-gear and said drumspool, said means including an endwise-movable ring and a cross-key secured to and movable in the cross-slot in the drum-shaft, and adapted to interlock with the endwise-movable ring, toggle clutch devices mounted within and cooperating with the cylinder and joined with the piston, and adjusted by shifting said piston, and means exterior of the cylinder for shifting said piston, as set forth.

5. In combination with a drum -shaft, a drum-spool loosely mounted and having endwise movement thereon; of a hollow cylinder secured to and rotatable with the drum-shaft; drum-spool-shifting mechanism located within the cylinder and adapted to be interlocked and rotate therewith, said shifting mechanism'irisaid shifting mechanism, for the purposes specified. I

6. The combination in a drum-spool-shifting mechanismas described, with a drumshaft, a drum-spool and a collar or ringloosely mounted thereon; of a cylinder open at one end secured to the shaft to rotate therewith, means for endwise moving the drum-spool, said means being detachably located within the cylinder and adapted under said adjustment of the parts to interlock and rotate with the cylinder for adjusting said internal mech* anism, and a cap detachably and adjustably fitted over the open end of the cylinder, as set forth.

v7. The combination with the drum-shaft and drum-spool, and the ring loosely mounted on said shaft for endwise movement thereon, and a drive-gear secured to rotate with said shaft; of a cylinder mounted on the drum-shaft to rotate therewith, a piston axially movable throughthe cylinder, a key cooperating therei with for interlocking with the endwise-movable ring on thedrurn-shaft, toggle devices mounted on the piston joined with the cylinder adapted under one adjustment to lock the drum-spool and the drive-gear to movev together; means for reciprocating said piston, for the purposes specified.

8. In a clutch mechanism as described; the combination with the drum-shaft having a drive-gear secured thereon, and a drum-spool and a ring loosely mounted and having endwise movement thereon; of a cylinder secured to the drum-shaft to rotate therewith and having diametrically opposite longitudinal guides I at each end, a cross-bar for engaging the guides at one end, of a disk havmg portions for engaging the guides at the other end, a

piston axially movable in the cylinder and connecting to said cross-bar, a stem axially projected from the cross-bar through the drum-shaft, a key carried by the drum-shaft the cap-engaging disk, and toggles J for connecting the toggles H and I with the crossbar, a buffer-spring, and means exterior of the cylinder for reciprocating the piston, all being arranged substantially as shown and described.

SPURGEON J. DAVIS. Witnesses:

A. T. LEwIs, OGLESBY YOUNG. 

